If the system uses two workheads, how should the temperature measurement system be configured?

 If you have system with two independent heating workheads - so you have different parts being heated in position A and position B - then you can only deliver a certain power in position A and position B. You can monitor position A or position B, but you cannot control on either one. Both position A and B would have to be exactly the same part, exactly the same workhead to be able to then control off one of them to give the right output for both. But if they are two different parts, two different applications, then with one induction power supply, the control is to the power supply, and you can only then monitor and not control actively